Performance Evaluation of Low Heat Rejection Engines

1994 ◽  
Vol 116 (4) ◽  
pp. 758-764 ◽  
Author(s):  
X. Sun ◽  
W. G. Wang ◽  
R. M. Bata ◽  
X. Gao
Keyword(s):  
Fuel Injection ◽  
Direct Injection ◽  
Combustion Process ◽  
Engine Performance ◽  
Injection System ◽  
Fuel Injection System ◽  
Heat Rejection ◽  
Single Cylinder ◽  
Single Cylinder Engine ◽  
Low Heat Rejection Engine

Improving the performance of the Chinese B135 six-cylinder direct injection turbocharged and turbocompounded Low Heat Rejection Engine (LHRE) was based on experimental and analytical studies. The studies were primarily applied on a B1135 single-cylinder LHR engine and a conventional water-cooled B1135 single cylinder engine. Performance of the B1135 LHRE was worse than that of the conventional B1135 due to a deterioration in the combustion process of the B1135 LHRE. The combustion process was improved and the fuel injection system was redesigned and applied to the B135 six-cylinder LHRE. The new design improved the performance of the LHRE and better fuel economy was realized by the thermal energy recovered from the exhaust gases by the turbocompounding system.

scholarly journals Experimental investigations of a single cylinder genset engine with common rail fuel injection system

2014 ◽  
Vol 18 (1) ◽  
pp. 249-258 ◽  
Author(s):  
Paras Gupta ◽  
Atul Dhar ◽  
Avinash Agarwal
Keyword(s):  
Fuel Injection ◽  
Combustion Engine ◽  
Pressure Rise ◽  
Engine Performance ◽  
Common Rail ◽  
Injection System ◽  
Experimental Investigations ◽  
Fuel Injection System ◽  
Single Cylinder ◽  
Ci Engines

Performance and emissions characteristics of compression ignition (CI) engines are strongly dependent on quality of fuel injection. In an attempt to improve engine combustion, engine performance and reduce the exhaust emissions from a single cylinder constant speed genset engine, a common rail direct injection (CRDI) fuel injection system was deployed and its injection timings were optimized. Results showed that 34?CA BTDC start of injection (SOI) timings result in lowest brake specific fuel consumption (BSFC) and smoke opacity. Advanced injection timings showed higher cylinder peak pressure, pressure rise rate, and heat release rate due to relatively longer ignition delay experienced.

CFD Numerical Simulation of Internal Flow for Electronic Gasoline Injector

2011 ◽  
Vol 97-98 ◽  
pp. 745-751
Author(s):  
Xiao Yan Li ◽  
Zhen Dong Zhang ◽  
Hao Qian ◽  
Qiang Cheng
Keyword(s):  
Computational Models ◽  
Fuel Injection ◽  
Combustion Process ◽  
Three Dimensional ◽  
Engine Performance ◽  
Internal Flow ◽  
Exhaust Emissions ◽  
Injection System ◽  
Fuel Injection System ◽  
Increasing Demand

There is increasing demand for a finer atomization of fuel spray in order to improve the engine performance and mileage, reduce exhaust emissions and then improve the transient response. In general, for an engine to comply with this demand, exhaust turbocharger and EGR are necessary especially electronic fuel injection system. As a key part of electronic fuel injection system, the performances of electronic gasoline injector improve the engine power outlet and fuel economy. In other words, electronic gasoline injector can achieve a wonderful dynamic response to improve the combustion process and reduce the exhaust emissions in engine. The aim of this paper is to define a CFD methodology for the simulation of gasoline injector. A two-step work procedure has been adopted. First, three-dimensional computational models of gasoline injector with two kinds of valve seat are created. Then, the simulations are conducted for different geometric parameters of nozzles with properly initialized. The results are used to analysis pressure distribution and the changes of average velocity in the nozzles.

Introduction to the Conception of Combustion Process Onboard Monitoring System

2014 ◽  
Vol 214 ◽  
pp. 83-93
Author(s):  
Andrzej Bieniek
Keyword(s):  
Monitoring System ◽  
Pressure Sensor ◽  
Rotational Speed ◽  
Fuel Injection ◽  
Combustion Engine ◽  
Combustion Process ◽  
Injection System ◽  
Fuel Injection System ◽  
Speed Sensor ◽  
Future Potential

This paper presents a conception of a system designed for monitoring combustion process in a multi-cylinder combustion engine. The proposed system is based on the application of a pressure sensor installed in one of the engine’s cylinders. The analysis of the combustion process in the remaining cylinders is possible as a result of analyzing the course of the rotational speed by means of a sensor with a large resolution integrated with engine control phase sensor. This paper presents results of the initial testing of its operation and results of research into a system named CPMOS (Combustion Process Onboard Monitoring System) dedicated to a self-ignition engine of an off-highway vehicle. The use of an algorithm which applies a synthesis of a pressure sensor signal and rotational speed sensor offers the possibility of gaining a reconstructed course of pressure in all cylinders in the engine. The proposed measurement of pressure in a cylinder not involving fuel injection system can provide more detailed information regarding the course of the combustion process in the particular cylinders. The proposed concept of the CPMOS system leads to a decrease in the overall system cost as a result of the application of a single pressure sensor in a single cylinder. The future potential application of the monitoring of the combustion in each cylinder can enable the improvement of the operating parameters of the cylinders as a result of optimizing the control of the fuel injection system, EGR system and systems used for limiting exhaust gases used in the vehicle.

Predicting Hydrocarbon Emissions From Direct Injection Diesel Engines

2002 ◽  
Vol 124 (3) ◽  
pp. 708-716 ◽  
Author(s):  
P. A. Lakshminarayanan ◽  
N. Nayak ◽  
S. V. Dingare ◽  
A. D. Dani
Keyword(s):  
Diesel Engines ◽  
Fuel Injection ◽  
Direct Injection ◽  
Injection System ◽  
Hydrocarbon Emissions ◽  
Operating Parameters ◽  
Fuel Injection System ◽  
Lean Combustion ◽  
Medium Speed ◽  
Hc Emissions

Hydrocarbon (HC) emissions from direct injection (DI) diesel engines are mainly due to fuel injected and mixed beyond the lean combustion limit during ignition delay and fuel effusing from the nozzle sac at low pressure. In the present paper, the concept has been developed to provide an elegant model to predict the HC emissions considering slow burning. Eight medium speed engines differing widely in bores, strokes, rated speeds, and power were studied for applying the model. The engines were naturally aspirated, turbocharged, or turbocharged with intercooling. The model has been validated by collecting data on HC emission, and pressures in the cylinder and in the fuel injection system from the experimental engines. New coefficients for the correlation of HC with operating parameters were obtained and these are different from the values published earlier, based on single-engine experiments.

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